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Look, I made a pretty picture of some subhalos :)
Alexia
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I dont think this was in an email, but this plot ennumerates the number of unique subhalos that particles of very high velocity belong to. The fact that this is not flat implies that high velocity particles typically occupy many distinct subhalos.
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Here are two plots. These are made by breaking the particles into radial bins, and studying the top N highest velocity particles. The first is similar to the plot I made before, that demonstrated that the highest velocity particles in the halo did not belong to only a few distict subhalos. This plot shows that this statement is true at all radii, but that high velocity particles are slightly more clumped at large r than at small r.
The second is the plot Alex asked me to make (or some version thereof). It shows slices through physical and velocity spaces. This plot shows the 30 highest velocity particles in each of 70 linearly spaced radial bins, color coded by radius. There are stream-like features at higher r, and they appear to be spatially non-local, but they aren't as screamingly obvious as I would have thought given Alex's sphere movie. I've attached a similar plot where the color coding is by subhalo... so you can convince yourself that these streamy things are not actually subhalos, which was my first impression.
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Attached are the plots Daniel asked me to make. The number within 100km/s of max is highly variable. But the streams are much more apparent with this scheme.
I removed the center (whose velocities were isotropic anyhow) and reduced the number of bins to 30. Here are the same two plats as in the last email.
Attached are 4 plots. One plots has 3 subplots which are three projections of the z=0 (well -0.0002 actually) positions of the highest velocity particles in one of the halos of the simulation. These are the particles that are within 100 km/s of the highest v particle at each of a bunch of concentric radial bins.
The other three plots show the positions of the particles at several earlier redshifts going back to z=1(one plot for each projection).
Assuming the units of x,y,z is kpc, it looks to me like this is a largish halo with diameter around 2Mpc, and that all of the highest V particles were already inside the halo by z=1. They were living in a number of fairly compact structures, that gradually got fuzzier as time went along. Note, these are not the highest v particles at each redshift, they are the same set of particles in each picture (those with highest V at z=0).
By the way, maybe this stuff is just outside the halo, because it's not orbiting around, it's stationary roughly, since z=1.
